Accumulators

Accumulators track incremental runtime data, such as motor run hours, power consumption, and downtime. You set a trigger (for example, motor on) to increment three counters:

• The number of times the accumulator is triggered (for example the number of starts for the motor).

• The run time, in steps of 1 second.

• A totalizer value, by an increment you define.

The accumulated data is stored as variable tags in an I/O device. This allows easy access to these variables and, because they are saved in the I/O device, their values are retained if the project is shutdown.

Variable tags are read at startup and updated regularly while the trigger is active. You can monitor and display accumulated data by animating, trending, or logging the variable tags.

You can increase system performance by storing these variables in a disk I/O device. If you store these variables in an external I/O devices, communications bandwidth will be consumed updating the variables. If using a network, you can use a redundant disk I/O device to secure these variables.

Note: The accumulator server runs as a part of the report server. You need to add a report server to your project to make accumulators work. See Add a Report Server Process.

If you have a redundant reports server, you need to use a primary/standby configuration to stop the accumulators running on both reports servers. Use the Setup Wizard to define the reports servers.

You can control (re-read or reset) any accumulator at runtime by using the AccControl Cicode function.

See Also

Add an Accumulator